Letter link: Carpenter #153: Letter from J.R.R. Tolkien to Peter Hastings • late September 1954? (#401)

"the Noldor or Loremasters, were always on the side of ‘science and technology’". When this sentence is quoted in UT, it became "the Noldor or Loremasters, were always vulnerable on the side of ‘science and technology’", which appears to make more sense.